Academic article
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Johannessen, Håkon Greve ; Hallan, Geir; Kadar, Thomas Istvan Edelsvärd
et al. (2025). Early cup migration and wear as predictors for later aseptic loosening: a secondary evaluation of a randomized controlled RSA trial on cemented hip arthroplasties with 18-year follow-up. (external link)
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Seip, Andreas Ottersen; Hellum, Christian; Fagerland, Morten
et al. (2025). Surgeon Recommendation and Outcomes of Decompression With vs Without Fusion in Patients With Degenerative Spondylolisthesis. (external link)
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Hermansen, Erland; Franssen, Eric; Myklebust, Tor Åge
et al. (2025). No long term benefit of decompression of a borderline lumbar spinal stenosis level adjacent to a more stenotic index level. (external link)
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Brisby, Helena; Myklebust, Tor Åge; BANITALEBI, HASAN
et al. (2024). Adjacent Level Canal Area Changes up to Two Years After Lumbar Spinal Stenosis Decompressive Surgery. (external link)
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Tronstad, Sara; Haug, Knut Jørgen; Myklebust, Tor Åge
et al. (2024). Do patients with lumbar spinal stenosis benefit from decompression of levels with adjacent moderate stenosis? A prospective cohort study from the NORDSTEN study. (external link)
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Hagerup, Sondre; Brox, Jens Ivar; Banitalebi, Hasan
et al. (2024). The Influence of Spinous Process Union on Clinical Outcomes After Spinous Process Osteotomy for Lumbar Spinal Stenosis After 2 Years: A Secondary Analysis From the NORDSTEN-Study. (external link)
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Kgomotso, Eric Loratang; Hellum, Christian; Fagerland, Morten
et al. (2024). Decompression alone or with fusion for degenerative lumbar spondylolisthesis (Nordsten-DS): five year follow-up of a randomised, multicentre, non-inferiority trial. (external link)
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Wänman, Johan; Åkerstedt, Josefin; Banitalebi, Hasan
et al. (2024). The association between lumbar lordosis preoperatively and changes in PROMs for lumbar spinal stenosis patients 2 years after spinal surgery: radiological and clinical results from the NORDSTEN-spinal stenosis trial. (external link)
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Rognsvåg, Turid; Bergvad, Ingvild Buset; Furnes, Ove Nord
et al. (2024). Exercise therapy, education, and cognitive behavioral therapy alone, or in combination with total knee arthroplasty, in patients with knee osteoarthritis: a randomized feasibility study. (external link)
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Hermansen, Erland; Indrekvam, Kari; Franssen, Eric
et al. (2024). A randomized trial on three different minimally invasive decompression techniques for lumbar spinal stenosis. Five years follow-up from the NORDSTEN-SST. (external link)
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Hermansen, Erland; Myklebust, Tor Åge; Austevoll, Ivar Magne
et al. (2024). Dural Sac Cross-sectional area change from preoperatively and up to 2 years after decompressive surgery for central lumbar spinal stenosis: investigation of operated levels, data from the NORDSTEN study. (external link)
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Franssen, Eric; Weber, Clemens; Myklebust, Tor Åge
et al. (2024). Clinical importance of redundant nerve roots in patients with symptomatic lumbar spinal stenosis: A secondary analysis of NORDSTEN spinal stenosis trial data. (external link)
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Weber, Clemens; Hermansen, Erland; Myklebust, Tor Åge
et al. (2024). Comparison of Patients Operated for Lumbar Spinal Stenosis with and Without Spondylolisthesis: A Secondary Analysis of the NORDSTEN Trials. (external link)
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Brisby, Helena; Myklebust, Tor Åge; Banitalebi, Hasan
et al. (2024). Adjacent Level Canal Area Changes up to 2 years after Lumbar Spinal Stenosis Decompressive Surgery. (external link)
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Banitalebi, Hasan; Hermansen, Erland; Hellum, Christian
et al. (2024). Preoperative fatty infiltration of paraspinal muscles assessed by MRI is associated with less improvement of leg pain 2 years after surgery for lumbar spinal stenosis. (external link)
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Indrekvam, Kari; Myklebust, Tor Åge; Austevoll, Ivar Magne
et al. (2024). Responsiveness of the Oswestry Disability Index and Zurich Claudication Questionnaire in patients with lumbar spinal stenosis: evaluation of surgically treated patients from the NORDSTEN study. (external link)
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Johannessen, Håkon Greve; Hallan, Geir; Kadar, Thomas Istvan Edelsvärd
et al. (2024). Polyethylene wear and cup migration of cemented total hip arthroplasty with femoral heads made of oxidized zirconium, steel, or cobalt chromium: a 10-year secondary analysis from a randomized trial using radiostereometry. (external link)
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Dybvik, Veronika; Hermansen, Erland; Banitalebi, Hasan
et al. (2023). Is Repeated Preoperative Magnetic Resonance Imaging Necessary Before Planned Decompressive Surgery for Lumbar Spinal Stenosis?. (external link)
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Hellum, Christian; Rekeland, Frode Gurvin; Småstuen, Milada Cvancarova
et al. (2023). Surgery in Degenerative Spondylolisthesis: Does fusion improve outcome in subgroups? A secondary analysis from a randomized trial (NORDSTEN trial). (external link)
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Hermansen, Erland; Myklebust, Tor Åge; Weber, Clemens
et al. (2023). Postoperative Dural Sac Cross-Sectional Area as an Association for Outcome After Surgery for Lumbar Spinal Stenosis: Clinical and Radiological Results From the NORDSTEN-Spinal Stenosis Trial. (external link)
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Aaen, Jørn Ståle; Banitalebi, Hasan; Austevoll, Ivar Magne
et al. (2023). Is the presence of foraminal stenosis associated with outcome in lumbar spinal stenosis patients treated with posterior microsurgical decompression. (external link)
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Indrekvam, Kari; Bånerud, Ingrid Fjeldheim; Hermansen, Erland
et al. (2023). The Norwegian degenerative spondylolisthesis and spinal stenosis (NORDSTEN) study: study overview, organization structure and study population. (external link)
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Høl, Paul Johan; Hallan, Geir; Furnes, Ove Nord
et al. (2022). Similarly low-blood metal ion levels at 10-years follow-up of total hip arthroplasties with Oxinium, CoCrMo, and stainless steel femoral heads. Data from a randomized clinical trial. (external link)
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Aaen, Jørn Ståle; Banitalebi, Hasan; Austevoll, Ivar Magne
et al. (2022). The association between preoperative MRI findings and clinical improvement in patients included in the NORDSTEN spinal stenosis trial. (external link)
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Banitalebi, Hasan; Aaen, Jørn Ståle; Storheim, Kjersti
et al. (2022). A novel MRI index for paraspinal muscle fatty infiltration: reliability and relation to pain and disability in lumbar spinal stenosis: results from a multicentre study. (external link)
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Banitalebi, Hasan; Espeland, Ansgar; Anvar, Masoud D
et al. (2022). Reliability of preoperative MRI findings in patients with lumbar spinal stenosis. (external link)
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Hermansen, Erland; Austevoll, Ivar Magne; Hellum, Christian
et al. (2022). Comparison of 3 Different Minimally Invasive Surgical Techniques for Lumbar Spinal Stenosis: A Randomized Clinical Trial. (external link)
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Rognsvåg, Turid; Lindberg, Maren Falch; Lerdal, Anners
et al. (2021). Development of an internet-delivered cognitive behavioral therapy program for use in combination with exercise therapy and education by patients at increased risk of chronic pain following total knee arthroplasty. (external link)
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Aaen, Jørn; Austevoll, Ivar Magne; Hellum, Christian
et al. (2021). Clinical and MRI findings in lumbar spinal stenosis: baseline data from the NORDSTEN study. (external link)
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Austevoll, Ivar Magne; Hermansen, Erland; Fagerland, Morten Wang
et al. (2021). Decompression with or without Fusion in Degenerative Lumbar Spondylolisthesis. (external link)
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Lindberg, Maren Falch; Aamodt, Arild; Badawy, Mona
et al. (2021). The effectiveness of exercise therapy and education plus cognitive behavioral therapy, alone or in combination with total knee arthroplasty in patients with knee osteoarthritis – study protocol for the MultiKnee trial. (external link)
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Høl, Paul Johan; Hallan, Geir; Indrekvam, Kari
(2021). Metallionenivåer i blod fra pasienter med metall-mot-metall-hofteprotese. (external link)
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Austevoll, Ivar Magne; Gjestad, Rolf; Solberg, Tore
et al. (2020). Comparative effectiveness of microdecompression alone vs decompression plus instrumented fusion in lumbar degenerative spondylolisthesis. (external link)
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Hermansen, Erland; Austevoll, Ivar Magne; Hellum, Christian
et al. (2020). Comparable increases in dural sac area after three different posterior decompression techniques for lumbar spinal stenosis: radiological results from a randomized controlled trial in the NORDSTEN study. (external link)
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Austevoll, Ivar Magne; Hermansen, Erland; Fagerland, Morten
et al. (2019). Decompression alone versus
decompression with instrumental fusion
the NORDSTEN degenerative
spondylolisthesis trial (NORDSTEN-DS);
study protocol for a randomized controlled
trial. (external link)
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Hermansen, Erland; Myklebust, Tor Åge; Austevoll, Ivar Magne
et al. (2019). Clinical outcome after surgery for lumbar
spinal stenosis in patients with insignificant
lower extremity pain. A prospective cohort
study from the Norwegian registry for
spine surgery. (external link)
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Austevoll, Ivar Magne; Gjestad, Rolf; Grotle, Margreth
et al. (2019). Follow-up score, change score or percentage change score for determining clinical important outcome following surgery? An observational study from the Norwegian registry for Spine surgery evaluating patient reported outcome measures in lumbar spinal stenosis and lumbar degenerative spondylolisthesis. (external link)
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Hermansen, Erland; Austevoll, Ivar Magne; Romild, Ulla Kristina
et al. (2017). Study-protocol for a randomized controlled trial comparing clinical and radiological results after three different posterior decompression techniques for lumbar spinal stenosis: the Spinal Stenosis Trial (SST) (part of the NORDSTEN Study). (external link)
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Badawy, Mona; Espehaug, Birgitte; Fenstad, Anne Marie
et al. (2017). Patient and surgical factors affecting procedure duration and revision risk due to deep infection in primary total knee arthroplasty.. (external link)
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Badawy, Mona; Fenstad, Anne Marie; Bartz-Johannessen, Christoffer
et al. (2017). Hospital volume and the risk of revision in Oxford unicompartmental knee arthroplasty in the Nordic countries -an observational study of 14,496 cases. (external link)
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Austevoll, Ivar Magne; Gjestad, Rolf; Brox, Jens Ivar
et al. (2016). The effectiveness of decompression alone compared with additional fusion for lumbar spinal stenosis with degenerative spondylolisthesis: a pragmatic comparative non-inferiority observational study from the Norwegian Registry for Spine Surgery. (external link)
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Hermansen, Erland; Romild, Ulla Kristina; Austevoll, Ivar Magne
et al. (2016). Does surgical technique influence clinical outcome after lumbar spinal stenosis decompression? A comparative effectiveness study from the Norwegian Registry for Spine Surgery. (external link)
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Harboe, Knut; Ellingsen, Christian Lycke; Sudmann, Einar
et al. (2015). Can bone apposition predict the retention force of a femoral stem? An experimental weight-bearing hip-implant model in goats.. (external link)
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Jonsson, Benedikt Arni; Kadar, Thomas; Havelin, Leif Ivar
et al. (2015). Oxinium modular femoral heads do not reduce polyethylene wear in cemented total hip arthroplasty at five years: A randomised trial of 120 hips using radiostereometric analysis. (external link)
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Badawy, Mona; Fenstad, Anne Marie; Indrekvam, Kari
et al. (2015). The risk of revision in total knee arthroplasty is not affected by previous high tibial osteotomy. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2014). Higher revision risk for unicompartmental knee arthroplasty in low-volume hospitals. (external link)
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Hermansen, Erland; Moen, Gunnar; Fenstad, Anne Marie
et al. (2014). Spinous process osteotomy to facilitate the access to the spinal canal when decompressing the spinal canal in patients with lumbar spinal stenosis.. (external link)
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Laborie, Lene Bjerke; Markestad, Trond; Davidsen, Henrik
et al. (2014). Selective ultrasound screening for developmental hip dysplasia: Effect on management and late detected cases. A prospective survey during 1991-2006. (external link)
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Harboe, Knut; Gjerdet, Nils Roar; Sudmann, Einar
et al. (2014). Assessment of retention force and bone apposition in two differently coated femoral stems after 6 months of loading in a goat model. (external link)
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Hermansen, Erland; Moen, Gunnar; Barstad, Johan
et al. (2013). Laminarthrectomy as a surgical approach for decompressing the spinal canal: assessment of preoperative versus postoperative dural sac cross-sectional areal (DSCSA). (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2013). Influence of hospital volume on revision rate after total knee arthroplasty with cement. (external link)
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Kadar, Thomas; Furnes, Ove; Aamodt, Arild
et al. (2012). The influence of acetabular inclination angle on the penetration of polyethylene and migration of the acetabular component: A prospective, radiostereometric study on cemented acetabular components. (external link)
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Bertz, Ari; Indrekvam, Kari; Ahmed, Mohamed
et al. (2012). Validity and reliability of preoperative templating in total hip arthroplasty using a digital templating system. (external link)
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Kadar, Thomas; Hallan, Geir; Aamodt, Arild
et al. (2011). A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years. (external link)
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Kadar, Thomas; Hallan, Geir; Aamodt, Arild
et al. (2011). Wear and migration of highly cross-linked and conventional cemented polyethylene cups with cobalt chrome or Oxinium femoral heads: A randomized radiostereometric study of 150 patients. (external link)
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Ravnskog, Fred-Arild; Espehaug, Birgitte; Indrekvam, Kari
(2011). Randomised clinical trial comparing hydrofiber and alginate dressings post hip replacement. (external link)
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Mohr, Emil; Indrekvam, Kari
(1996). Kvalitetssikring av hofteprotesekirurgi. (external link)
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Indrekvam, Kari; Lekven, Jon; Engesæter, Lars B.
et al. (1992). Effects of intramedullary reaming and nailing on blood flow in rat femora. (external link)
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Indrekvam, Kari; Husby, O.S.; Gjerdet, N. R.
et al. (1991). Age-dependent mechnical properties of rat femur. (external link)
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Indrekvam, Kari; Gjerdet, N. R.; Engesæter, Lars B.
et al. (1991). Effects of intramedullary reaming and nailing of rat femur. A mechanical and chemical study. (external link)
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Indrekvam, Kari; Vikøyr, Inger; Vie, R. T.
et al. (1991). Age-related differences in chemical composition of rat femur as determinants for strain. (external link)
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Indrekvam, Kari; Vikøyr, Inger; Lie, Rolv Terje
et al. (1991). Age-related differences in chemical composition of rat femur as determinants for strain. (external link)
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Indrekvam, Kari; Gjerdet, N. R.; Engesæter, Lars B.
et al. (1991). Effects of intramedullary reaming and nailing of rat femur. A mechanical and chemical study. (external link)
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Indrekvam, Kari; Vikøyr, Inger; Lie, Rolv Terje
et al. (1991). Age-related differences in biochemical composition of rat femur as determinants for strain. (external link)
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Indrekvam, Kari; Husby, O. S.; Gjerdet, N. R.
et al. (1991). Age-dependent mechanical properties of rat femur measured in vivo and in vitro. (external link)
Reader opinion piece
Errata
Poster
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Banitalebi, Hasan; Hermansen, Erland; Hellum, Christian
et al. (2023). Association between preoperative fatty infiltration of the paraspinal muscles and persistent leg pain after surgery for LSS. (external link)
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Rognsvåg, Turid; Bergvad, Ingvild Buset; Furnes, Ove Nord
et al. (2022). Effekt av trening, undervisning og kognitiv adferdsterapi for artrosepasienter med eller uten totalprotese i kne: En randomisert feasibility studie. (external link)
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Johannessen, Håkon Greve; Kadar, Thomas; Hallan, Geir
et al. (2022). Polyethylene Wear In Total Hip Arthroplasty; Comparing Oxinium And CoCr Femoral Heads Using Radiostereometry With 10 Years Follow-Up. (external link)
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Lindberg, Maren Falch; Rognsvåg, Turid; Badawy, Mona
et al. (2019). Optimal behandling av artrosepasienter - en feasibilitystudie (MultiKnee trial). (external link)
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Rognsvåg, Turid; Lindberg, Maren Falch; Borchgrevink, Petter Chr.
et al. (2018). Multi-Knee Trial. En feasibilty-studie av en intervensjon for artrosepasienter med økt risiko for langvarige smerter etter operasjon med kneprotese. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2012). Revision rate is influenced by hospital and surgeon volume in total knee arthroplasty. (external link)
-
Hermansen, Erland; Moen, Gunnar; Birketvedt, Rune
et al. (2012). Lamiarthrectomi as a surgical approach for decompressing the spinal canal. Assessment of preoperative versus postoperative Dural Sac Cross Sectional Area (DSCSA). (external link)
-
Kadar, Thomas; Hallan, Geir; Aamodt, Arild
et al. (2011). A randomized study on migration of the Spectron EF and the Charnley flanged 40 cemented femoral components using radiostereometric analysis at 2 years. (external link)
-
Kadar, Thomas; Hallan, Geir; Aamodt, Arild
et al. (2010). Wear of highly cross-linked and conventional ultra-high molecular weight semented polyethylene cups with oxidized zirconium (Oxinium) or Cobalt Chrome femoral heads. A randomized study of 150 hips using radiostereometric analysis. (external link)
Academic lecture
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Banitalebi, Hasan; Hermansen, Erland; Hellum, Christian
et al. (2023). Fatty Infiltration of the Paraspinal Muscles Is Associated with Postoperative Leg Pain in Lumbar Spinal Stenosis. (external link)
-
Rognsvåg, Turid; Lindberg, Maren Falch; Lerdal, Anners
et al. (2022). Development of an internet-delivered cognitive behavioral therapy program for use in combination with exercise therapy and education by patients at increased risk of chronic pain following total knee arthroplasty. (external link)
-
Johannessen, Håkon Greve; Kadar, Thomas; Hallan, Geir
et al. (2021). Polyethylene wear in total hip arthroplasty; comparing Oxinium and CoCr femoral heads using radiostereometry with 10 years follow-up. (external link)
-
Høl, Paul Johan; Hallan, Geir; Furnes, Ove Nord
et al. (2020). Metallionenivåer i blod etter 10 år med hofteproteser med ulike hodematerialer. (external link)
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Høl, Paul Johan; Indrekvam, Kari; Bierling, Roel
et al. (2016). Metallionenivåer i blod over 5 år med "Birmingham resurfacing" hofteprotese. (external link)
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Moen, Vegard Pihl; Badawy, Mona; Indrekvam, Kari
et al. (2014). Utarbeidelse av norsk versjon av «Forgotten Joint Score». (external link)
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Høl, Paul Johan; Indrekvam, Kari; Bierling, Roel
et al. (2013). Metallkonsentrasjon i blod hos pasienter med "Birmingham resurfacing" hofteprotese. En prospektiv longitudinell studie i en norsk cohort. (external link)
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Seip, Andreas Ottersen; Ellison, Peter; Mølster, Anders
et al. (2012). Mekanisk testing av pedikkelsskruekonstruksjoner. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2012). Revision rate is influenced by hospital and surgeon volume in Unicompartmental Knee Arthroplasty. (external link)
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Seip, Andreas Ottersen; Ellison, Peter; Mølster, Anders
et al. (2012). Mechanical properties of spinal implants. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2012). Revision rate is influenced by hospital and surgeon volume in total knee arthroplasty. (external link)
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Ahmed, Mohamed; Hermansen, Erland; Austevoll, Ivar Magne
et al. (2012). Norsk spinal stenose studie. (external link)
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Austevoll, Ivar Magne; Indrekvam, Kari; Müller, Oliver
et al. (2012). Degenerativ pondylolisthese: Er det nødvendig å gjøre fiksasjon i tillegg til dekompresjon? Presentasjon av planlagt norsk multisenterstudie. (external link)
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Hermansen, Erland; Austevoll, Ivar Magne; Hellum, Christian
et al. (2012). Norsk spinal stenose studie. Resultater etter tre ulike kirurgiske metoder for behandling av lumbal spinal stenose. En randomisert studie som sammenligner laminarthrectomi, bilateral laminotomi og unilateral laminotomi med crossover. (external link)
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Kadar, Thomas; Havelin, Leif Ivar; Indrekvam, Kari
et al. (2011). Betydningen av sementerte koppers inklinasjonsvinkel på plastslitasje og koppmigrasjon. En prospektiv randomisert studie. (external link)
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Bertz, Ari; Indrekvam, Kari; Ahmed, Mohamed
et al. (2011). Nøyaktighet av preoperativ digital planlegging ved innsetting av total protese i hofteleddet ved bruk av MDesk system. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2011). Er risikoen for revisjon større ved lavt sykehus og kirurgvolum ved unicondylære proteser. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2011). Impact of procedure volume on the results of total knee arthroplasty. (external link)
-
Kadar, Thomas; Hallan, Geir; Aamodt, Arild
et al. (2010). A randomized study of the Spectron EF and the Charnley flanged 40 cemented femoral components. (external link)
-
Hermansen, Erland; Moen, Gunnar; Birketvedt, Rune
et al. (2010). Laminartrectomi som kirurgisk tilgang for å dekompremere spinal kanalen. Vurdering av ostetomitilheling på processus spinosus. (external link)
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Badawy, Mona; Espehaug, Birgitte; Indrekvam, Kari
et al. (2010). Operasjonsvolum av totale kneproteser i Nore 1994- 2009. (external link)
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Hermansen, Erland; Moen, Gunnar; Birketvedt, Rune
et al. (2010). Laminarthrectomi som kirurgisk tilgang for å dekompremere spinalkanalen. Vurdering av preoperativt versus postoperativt Dural Sac Cross Sectional Area (DSCSA). (external link)
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Kristoffersen, Målfrid Holen; Badawy, Mona; Bierling, Roel
et al. (2010). Proteseluksasjoner etter overgang til bakre tilgang. En kvalitetskontroll av primærproteser operert med direkte lateral tilgang i 2004 og bakre tilgang i 2009 ved Kysthospitalet i Hagevik. (external link)
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Gøthesen, Ø; Indrekvam, Kari; Braaten, Sjur
(2006). Direkte reparasjon av buedefekt. (external link)
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Ellingsen, Guri; Christensen, Marte; Indrekvam, Kari
(2006). Proximal valgiserende tibiaosteotomi som behandling av gonarthrose. (external link)
Doctoral dissertation
Report
Popular scientific chapter/article
Academic chapter/article/Conference paper
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